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发明名称
A REVERSE CIRCULATION DOWN-THE-HOLE HAMMER DRILL AND BIT THEREFOR
摘要
申请公布号
ZA8800188(B)
申请公布日期
1988.09.28
申请号
ZA19880000188
申请日期
1988.01.12
申请人
MINROC TECHNICAL PROMOTIONS LIMITED
发明人
JOHN CALLAM ALLAN TEMPLETON BROWN;PATRICK PURCELL;PETER JOSEPH SWEENY
分类号
E21B;E21B4/06;E21B10/36;E21C
主分类号
E21B
代理机构
代理人
主权项
地址
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